Police inspector Leo Tooman says the 31-year-old man died and his 28-year-old wife of four days was critically injured when their car collided with a truck Thursday morning. He says the couple failed to yield at an intersection near the Waitomo Caves.
The network of caves attracts thousands of tourists each year who come to see the glowworms, an unusual species with a bioluminescent glow similar to that of a firefly.
Another American tourist died at the same intersection in February.
New Zealand cars drive on the left side of the road. Tourists have been known to revert to the opposite side in traffic emergencies.